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Manganese series deoxidants and their prepn process

A deoxidizer, manganese-based technology, used in chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult to achieve ideal requirements, narrow application range, etc. Effect

Active Publication Date: 2007-06-06
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Currently commercially available manganese-based deoxidizers generally use activated alumina as a support carrier and high-alumina cement as a binder. Although they can be used for fine deoxidation of gases, their scope of application is narrow and they are only suitable for lower oxygen content (O 2 ≤200ppm) fine deoxidation of gas, it is difficult to meet the ideal requirements for fine deoxidation of gas with high oxygen content

Method used

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  • Manganese series deoxidants and their prepn process

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Embodiment 1

[0034] The present embodiment manganese series deoxidizer is made up of the following components by weight percentage (with the sum of active component, support carrier, binding agent part amount being 100%):

[0035] MnO 2 40%, 4A molecular sieve 30%, attapulgite 30%, and lignin accounts for MnO 2 10% of the total weight of the mixture of 4A molecular sieve and attapulgite.

[0036] The present embodiment manganese series deoxidizer is made by following method:

[0037] (1), the MnO of described portion 2 , 4A molecular sieve, attapulgite and lignin are mixed evenly, and crushed into a powder of more than 300 mesh;

[0038] (2), the powder rolling ball molding of (1) step;

[0039] (3) Calcining the mixture formed in step (2) at 300-400° C. for 3-5 hours to obtain the manganese-based deoxidizer.

Embodiment 2

[0041] The present embodiment manganese series deoxidizer is made up of the following components by weight percentage (with the sum of active component, support carrier, binding agent part amount being 100%):

[0042] MnO 2 35%, 5A molecular sieve 15%, kaolin 50%, and lignin accounts for MnO 2 15% of the total weight of the mixture of 5A molecular sieve and kaolin clay.

[0043] The present embodiment manganese series deoxidizer is made by following method:

[0044] (1), the MnO of described portion 2 , 5A molecular sieve, kaolin and lignin are mixed evenly, and crushed into a powder of more than 300 mesh;

[0045] (2), the powder compression molding of (1) step;

[0046] (3) Calcining the mixture formed in step (2) at 400-450° C. for 3-5 hours to obtain the manganese-based deoxidizer.

Embodiment 3

[0048] The present embodiment manganese series deoxidizer is made up of the following components by weight percentage (with the sum of active component, support carrier, binding agent part amount being 100%):

[0049] MnCO 3 30%, 13X molecular sieve 50%, diatomaceous earth 20%, and lignin accounts for MnCO 3 , 5% of the total weight of the mixture of 13X molecular sieve and diatomaceous earth.

[0050] The present embodiment manganese series deoxidizer is made by following method:

[0051] (1), the MnCO of described portion 3 , 13X molecular sieve, diatomaceous earth and lignin are mixed evenly, and crushed into a powder of more than 300 mesh;

[0052] (2), the powder rolling ball molding of (1) step;

[0053](3) Calcining the mixture formed in step (2) at 400-500° C. for 3-5 hours to obtain the manganese-based deoxidizer.

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Abstract

The manganese series deoxidants consist of active component, supporter, adhesive and pore expander, where the active component is manganese oxide and the supporter is molecular sieve. The manganese series deoxidants have high deoxidizing activity, great oxygen capacity and high deoxidizing precision, and may be used in deoxidizing multiple kinds of gas, especially precise deoxidation of gas with high oxygen content. In addition, the manganese series deoxidants have high mechanical strength, no powdering and no chocking, and may be used in industrial production. The present invention also discloses the preparation process of the manganese series deoxidants.

Description

technical field [0001] The invention belongs to the technical field of deoxidation in the chemical industry, and in particular relates to a manganese-based deoxidizer and a preparation method thereof. Background technique [0002] There are two types of deoxidizers or deoxidation catalysts currently used in industry: the first type is catalytic reaction deoxidation. For the purpose of oxygen, most of these deoxidation catalysts use noble metals such as Pt and Pd as active components, which have the advantages of wide operating temperature, high space velocity and low residual oxygen, but hydrogen is required in the reaction, and there are strict requirements on hydrogen content High-purity gases are not suitable, and such catalysts are expensive. The second type of deoxidizer is chemical adsorption reaction deoxidation. The deoxidation mechanism is that the oxygen in the raw gas reacts with the deoxidizer to remove oxygen. This kind of deoxidizer uses Mn, Cu, Ni, etc. as ac...

Claims

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Application Information

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IPC IPC(8): B01J20/06
Inventor 陈耀壮胡善霖张鑫鄢义雷菊梅白燕陈群文
Owner HAO HUA CHENGDU TECH
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